Cleaning sponge



FIG. 1 is a perspective view of a first embodiment showing the new design for a cleaning sponge;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof, the left side view being a mirror image thereof;

FIG. 4 is a front view thereof, the rear view being a mirror image thereof;

FIG. 5 is a perspective view of a second embodiment showing the new design for a cleaning sponge;

FIG. 6 is a top view thereof;

FIG. 7 is a right side view thereof, the left side view being a mirror image thereof; and,

FIG. 8 is a front view thereof, the rear view being a mirror image thereof.

The figures depict a two layer structure. Also, it is understood that the surface shading is not intended to be indicative of gloss or texture and forms no part of the claimed design. 

The ornamental design for a cleaning sponge, as shown and described. 